Windows 7 64bit Java problem

peter7769

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12:48 AM
Messages
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Hi
Please can someone help, for a while now i have not been able to run Java programs on my windows 7 64bit machine, i know it has something to do with corrupt or missing registry settings and file associations, but just cant seem to get it to work, i have also made matters worse as before i could run them on one user account but not the other. Now i cant get them to run on either :-(
Please can anyone help??

The error message comes up saying "Could not find the main Class" whenever i double click a jar file.

Also when i download a java file/program the icon is just blank, so windows does not know how to open the file.

I am not that technical so if you could give me step by step instructions and i can try it when i get home tonight.

Thanks Pete :(
 

My Computer

OS
Windows 7 64 bit
When dealing with Java issues it is best to begin by uninstalling Java:



(click the pic for more info - be sure you uninstall both the 32 bit and 64 bit versions if you have them)

Then download the latest version(s)


(click the pic for more information)


(click the pic for links to the installers)
 

My Computer

Computer Manufacturer/Model Number
Toshiba L355D
OS
Windows 7 Ultimate x64 SP1
CPU
Core2 Duo
Motherboard
Intel
Memory
4 GB
Graphics Card(s)
GM965 on-board
Sound Card
RealTek on-board
Monitor(s) Displays
19"+17"(laptop)
Screen Resolution
1440x900 (x 2)
Hard Drives
500GB Ext. 200GB Internal
PSU
N/A
Case
N/A
Cooling
N/A
Thanks but that was the first thing I tried last night but it didn't help

Pete
 

My Computer

OS
Windows 7 64 bit
I had an issue with Java a few months ago and the above procedure fixed it for me.

I am sorry that it is not effective in your case. :(

There are many others here quite knowledgeable and I'm sure you'll receive the help you need.

Welcome to the Seven Forums, Pete! :D
 

My Computer

Computer Manufacturer/Model Number
Toshiba L355D
OS
Windows 7 Ultimate x64 SP1
CPU
Core2 Duo
Motherboard
Intel
Memory
4 GB
Graphics Card(s)
GM965 on-board
Sound Card
RealTek on-board
Monitor(s) Displays
19"+17"(laptop)
Screen Resolution
1440x900 (x 2)
Hard Drives
500GB Ext. 200GB Internal
PSU
N/A
Case
N/A
Cooling
N/A
No worries, thanks for the suggestion
 

My Computer

OS
Windows 7 64 bit
System restore back to a point before you had this problem?
 

My Computer

Computer type
PC/Desktop
Computer Manufacturer/Model Number
Home Built
OS
Windows 10 Education 64 bit
CPU
AMD Phenom II X4 980 Black Edition Deneb 3.7GHz
Motherboard
Asus M4N68T-M V2 µATX Motherboard
Memory
8GB 4GBx2 Kingston PC10600 DDR3 1333 Memory
Graphics Card(s)
Zotac NVIDIA Geforce GT640 2 Gig DDR3 PCIe
Sound Card
VIA VT1708s High Definition Audio 8-channel Onboard
Monitor(s) Displays
22" LG E2242 1080p and 2 19" I-INC AG191D
Screen Resolution
1280x1024 - 1920x1080 - 1280x1024
Hard Drives
Crucial M100 256 GB SSD and 500 GB WD Blue SATA
PSU
Thermaltake TR 620
Case
Power Up Black ATX Mid-Tower Case
Cooling
Stock heatsink and fan
Keyboard
Logitech Wireless K350 Wave
Mouse
Logitech Wireless M570 Trackman Wheel
Internet Speed
80 Mbps Down 30 Mbps Up
Antivirus
Windows Defender
Browser
Internet Explorer 11
Other Info
HP DVD1040e Lightscribe - External USB2
Hi
I have no idea how it happened it must have been something i did last night, but i switched the pc on when i got home tonight and its all back working!!!

Guess it must have been after the reboot that things must have sorted themselves out, i did change a few things in the registry so it can only have been that.

Thanks anyway

Pete :D
 

My Computer

OS
Windows 7 64 bit
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