Unable to login to Yahoo Mail

SlackerITGuy

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So here's the deal-o guys, ever since a couple of weeks ago, my dad's been unable to login to his Yahoo e-mail account, I've checked pretty much anything (AV or any other real-time shield blocking cookies or whatever, connecting his laptop directly to my ISP router, the list goes on and on).

What could be causing this?

Thanks.
 

My Computer My Computer

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Windows 8.1 ProIntel Core i5-2500K8GB Corsair Vengeance DDR3Sapphire Radeon HD 7970 GHz Vapor-X Edition
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Windows 8.1 Pro
CPU
Intel Core i5-2500K
Motherboard
ASRock Z77 Extreme4
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8GB Corsair Vengeance DDR3
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Sapphire Radeon HD 7970 GHz Vapor-X Edition
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Realtek ALC898
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BenQ XL2411T
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1920 x 1080 @ 144Hz
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Plextor M3 Pro 128GB
WD Caviar Blue
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Corsair Obsidian 650D
Cooling
Corsair H60 2013 Edition
Keyboard
Cooler Master Quick Fire Rapid
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Corsair Raptor M45
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Headphones: Sennheiser HD-515
See if it works in safe mode
See if you can log into his account with your computer
Download ccleaner and clean the crap from his computer, temp files, cache, etc.
Check browser security settings
Test with another browser.
 

My Computer My Computer

At a glance

Windows 10, Home Clean InstallIntel Core2 processsor Q8200(2.33Ghz 1333FSB)...6 gbATI Radeon 256MB HD3650
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell XPS 420
OS
Windows 10, Home Clean Install
CPU
Intel Core2 processsor Q8200(2.33Ghz 1333FSB) Quad Core Tech
Motherboard
Dell
Memory
6 gb
Graphics Card(s)
ATI Radeon 256MB HD3650
Sound Card
Intergrated 7.1 Channel Audio
Monitor(s) Displays
Dell SP2009W 20"
Hard Drives
640 GB Serial ATA Hard drive
Cooling
Fan
Keyboard
Dell USB Keyboard
Mouse
Dell Premium Optical USB
Internet Speed
DSL 2.85
See if it works in safe mode
See if you can log into his account with your computer
Download ccleaner and clean the crap from his computer, temp files, cache, etc.
Check browser security settings
Test with another browser.
Hmm I haven't tried in SM yet :huh:.

I have however tried with different browsers, running CCleaner, etc...
 

My Computer My Computer

At a glance

Windows 8.1 ProIntel Core i5-2500K8GB Corsair Vengeance DDR3Sapphire Radeon HD 7970 GHz Vapor-X Edition
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Windows 8.1 Pro
CPU
Intel Core i5-2500K
Motherboard
ASRock Z77 Extreme4
Memory
8GB Corsair Vengeance DDR3
Graphics Card(s)
Sapphire Radeon HD 7970 GHz Vapor-X Edition
Sound Card
Realtek ALC898
Monitor(s) Displays
BenQ XL2411T
Screen Resolution
1920 x 1080 @ 144Hz
Hard Drives
Plextor M3 Pro 128GB
WD Caviar Blue
PSU
Seasonic G Series 650W
Case
Corsair Obsidian 650D
Cooling
Corsair H60 2013 Edition
Keyboard
Cooler Master Quick Fire Rapid
Mouse
Corsair Raptor M45
Other Info
Headphones: Sennheiser HD-515
Safe mode will tell us a lot.
If that does work try a clean boot, so we can localize the cause.

Try using another user account, set one up if necessary.

Is his keyboard on cap lock or some other setting?
Can the keyboard be defective?

Can you log in with your computer using the password that he says is correct?
 

My Computer My Computer

At a glance

Windows 10, Home Clean InstallIntel Core2 processsor Q8200(2.33Ghz 1333FSB)...6 gbATI Radeon 256MB HD3650
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell XPS 420
OS
Windows 10, Home Clean Install
CPU
Intel Core2 processsor Q8200(2.33Ghz 1333FSB) Quad Core Tech
Motherboard
Dell
Memory
6 gb
Graphics Card(s)
ATI Radeon 256MB HD3650
Sound Card
Intergrated 7.1 Channel Audio
Monitor(s) Displays
Dell SP2009W 20"
Hard Drives
640 GB Serial ATA Hard drive
Cooling
Fan
Keyboard
Dell USB Keyboard
Mouse
Dell Premium Optical USB
Internet Speed
DSL 2.85
Safe mode will tell us a lot.
If that does work try a clean boot, so we can localize the cause.

Try using another user account, set one up if necessary.

Is his keyboard on cap lock or some other setting?
Can the keyboard be defective?

Can you log in with your computer using the password that he says is correct?
Yup.

I haven't thought about the keyboard... Interesting.

Well I'm definitely gonna try all these later tonight.

Thanks Rich!

+rep

EDIT: Rep failed =(.
 

My Computer My Computer

At a glance

Windows 8.1 ProIntel Core i5-2500K8GB Corsair Vengeance DDR3Sapphire Radeon HD 7970 GHz Vapor-X Edition
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Windows 8.1 Pro
CPU
Intel Core i5-2500K
Motherboard
ASRock Z77 Extreme4
Memory
8GB Corsair Vengeance DDR3
Graphics Card(s)
Sapphire Radeon HD 7970 GHz Vapor-X Edition
Sound Card
Realtek ALC898
Monitor(s) Displays
BenQ XL2411T
Screen Resolution
1920 x 1080 @ 144Hz
Hard Drives
Plextor M3 Pro 128GB
WD Caviar Blue
PSU
Seasonic G Series 650W
Case
Corsair Obsidian 650D
Cooling
Corsair H60 2013 Edition
Keyboard
Cooler Master Quick Fire Rapid
Mouse
Corsair Raptor M45
Other Info
Headphones: Sennheiser HD-515
Ok, if you cant give rep, Make me happy by saying that we found the solution, which is a lot better.

Why did it fail, the spread it around rule?
 

My Computer My Computer

At a glance

Windows 10, Home Clean InstallIntel Core2 processsor Q8200(2.33Ghz 1333FSB)...6 gbATI Radeon 256MB HD3650
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell XPS 420
OS
Windows 10, Home Clean Install
CPU
Intel Core2 processsor Q8200(2.33Ghz 1333FSB) Quad Core Tech
Motherboard
Dell
Memory
6 gb
Graphics Card(s)
ATI Radeon 256MB HD3650
Sound Card
Intergrated 7.1 Channel Audio
Monitor(s) Displays
Dell SP2009W 20"
Hard Drives
640 GB Serial ATA Hard drive
Cooling
Fan
Keyboard
Dell USB Keyboard
Mouse
Dell Premium Optical USB
Internet Speed
DSL 2.85
Ok, if you cant give rep, Make me happy by saying that we found the solution, which is a lot better.

Why did it fail, the spread it around rule?
Yup =/.
 

My Computer My Computer

At a glance

Windows 8.1 ProIntel Core i5-2500K8GB Corsair Vengeance DDR3Sapphire Radeon HD 7970 GHz Vapor-X Edition
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Windows 8.1 Pro
CPU
Intel Core i5-2500K
Motherboard
ASRock Z77 Extreme4
Memory
8GB Corsair Vengeance DDR3
Graphics Card(s)
Sapphire Radeon HD 7970 GHz Vapor-X Edition
Sound Card
Realtek ALC898
Monitor(s) Displays
BenQ XL2411T
Screen Resolution
1920 x 1080 @ 144Hz
Hard Drives
Plextor M3 Pro 128GB
WD Caviar Blue
PSU
Seasonic G Series 650W
Case
Corsair Obsidian 650D
Cooling
Corsair H60 2013 Edition
Keyboard
Cooler Master Quick Fire Rapid
Mouse
Corsair Raptor M45
Other Info
Headphones: Sennheiser HD-515
No problem, as I said come back with good news and that is much better than anything.
Ill post any new ideas, too.
 

My Computer My Computer

At a glance

Windows 10, Home Clean InstallIntel Core2 processsor Q8200(2.33Ghz 1333FSB)...6 gbATI Radeon 256MB HD3650
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell XPS 420
OS
Windows 10, Home Clean Install
CPU
Intel Core2 processsor Q8200(2.33Ghz 1333FSB) Quad Core Tech
Motherboard
Dell
Memory
6 gb
Graphics Card(s)
ATI Radeon 256MB HD3650
Sound Card
Intergrated 7.1 Channel Audio
Monitor(s) Displays
Dell SP2009W 20"
Hard Drives
640 GB Serial ATA Hard drive
Cooling
Fan
Keyboard
Dell USB Keyboard
Mouse
Dell Premium Optical USB
Internet Speed
DSL 2.85
Test with another browser, Chrome, FireFox etc.
Check all my posts, want to be sure you saw all the additions that I made

Hey heres a good one, check the keyboard driver. Any warning markers, is it up to date?
 

My Computer My Computer

At a glance

Windows 10, Home Clean InstallIntel Core2 processsor Q8200(2.33Ghz 1333FSB)...6 gbATI Radeon 256MB HD3650
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Dell XPS 420
OS
Windows 10, Home Clean Install
CPU
Intel Core2 processsor Q8200(2.33Ghz 1333FSB) Quad Core Tech
Motherboard
Dell
Memory
6 gb
Graphics Card(s)
ATI Radeon 256MB HD3650
Sound Card
Intergrated 7.1 Channel Audio
Monitor(s) Displays
Dell SP2009W 20"
Hard Drives
640 GB Serial ATA Hard drive
Cooling
Fan
Keyboard
Dell USB Keyboard
Mouse
Dell Premium Optical USB
Internet Speed
DSL 2.85
Sorry for the MASSIVE delay but, my old man was on a business trip for the past few weeks (and naturally he had his laptop with him).

So, I stopped by his house late last night and tried a few more things:

  • A complete Windows re-install (It's an HP, so I used the recovery partition)
  • Tried different browsers (Chrome, Safari, etc)
  • Different AV setups

And nothing.

Same problem persists, which is baffling to say the least. The weird thing is, he's able to sign in from his desktop without any issues, but with his laptop, it sometimes works, and sometimes it doesn't.
 

My Computer My Computer

At a glance

Windows 8.1 ProIntel Core i5-2500K8GB Corsair Vengeance DDR3Sapphire Radeon HD 7970 GHz Vapor-X Edition
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Windows 8.1 Pro
CPU
Intel Core i5-2500K
Motherboard
ASRock Z77 Extreme4
Memory
8GB Corsair Vengeance DDR3
Graphics Card(s)
Sapphire Radeon HD 7970 GHz Vapor-X Edition
Sound Card
Realtek ALC898
Monitor(s) Displays
BenQ XL2411T
Screen Resolution
1920 x 1080 @ 144Hz
Hard Drives
Plextor M3 Pro 128GB
WD Caviar Blue
PSU
Seasonic G Series 650W
Case
Corsair Obsidian 650D
Cooling
Corsair H60 2013 Edition
Keyboard
Cooler Master Quick Fire Rapid
Mouse
Corsair Raptor M45
Other Info
Headphones: Sennheiser HD-515
Sorry for the MASSIVE delay but, my old man was on a business trip for the past few weeks (and naturally he had his laptop with him).

So, I stopped by his house late last night and tried a few more things:

  • A complete Windows re-install (It's an HP, so I used the recovery partition)
  • Tried different browsers (Chrome, Safari, etc)
  • Different AV setups
And nothing.

Same problem persists, which is baffling to say the least. The weird thing is, he's able to sign in from his desktop without any issues, but with his laptop, it sometimes works, and sometimes it doesn't.

Did you try going directly to the Yahoo home page, then log in to his mail there, I'd start there first
 

My Computer My Computer

At a glance

Windows 7 Home Premium 64 bitIntel Core 2 quad Extreme Q9770 @ 3.2 GHz4x2 GB Muskin 1600 MHz ramNVidia GTX 250
Computer Manufacturer/Model Number
Dell XPS 730
OS
Windows 7 Home Premium 64 bit
CPU
Intel Core 2 quad Extreme Q9770 @ 3.2 GHz
Memory
4x2 GB Muskin 1600 MHz ram
Graphics Card(s)
NVidia GTX 250
Sound Card
Soundblaster X-Fi Fatality Champion
Monitor(s) Displays
2 Dell 2007WFP Ultrascans
Screen Resolution
3360 x 1050
Hard Drives
WD Black 1TB sata, 2-WD Black 500 sata, 2-Seagate 500 Go external
PSU
1000 Watt
Cooling
air
Keyboard
MS Natrual Keyboard Pro
Mouse
Logitech Wireless Trackball
Internet Speed
DSL Elite
Problem fixed.

Faulty ISP router.
 

My Computer My Computer

At a glance

Windows 8.1 ProIntel Core i5-2500K8GB Corsair Vengeance DDR3Sapphire Radeon HD 7970 GHz Vapor-X Edition
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Self Built
OS
Windows 8.1 Pro
CPU
Intel Core i5-2500K
Motherboard
ASRock Z77 Extreme4
Memory
8GB Corsair Vengeance DDR3
Graphics Card(s)
Sapphire Radeon HD 7970 GHz Vapor-X Edition
Sound Card
Realtek ALC898
Monitor(s) Displays
BenQ XL2411T
Screen Resolution
1920 x 1080 @ 144Hz
Hard Drives
Plextor M3 Pro 128GB
WD Caviar Blue
PSU
Seasonic G Series 650W
Case
Corsair Obsidian 650D
Cooling
Corsair H60 2013 Edition
Keyboard
Cooler Master Quick Fire Rapid
Mouse
Corsair Raptor M45
Other Info
Headphones: Sennheiser HD-515
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