Windows/Office Key Checker

Influx

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Is there any tool or method which I can use to check if a certain Windows Product or Microsoft Office key is valid?
 

My Computer

OS
Win7 Ultimate x64 SP1 / WCP x64 / Ubuntu 11 x64
No - the best you can do is telephone the Activation Center and ask them, if it's not already installed.
If it's Windows, and installed, use the MGADiag tool and post the output.
If it's Office 2002-2007, and installed, run MGADiag and post the output.
If it's Office 2010 post a query with your Product ID in the Answers Office forums
 
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My Computer

Computer type
Laptop
Computer Manufacturer/Model Number
Asus K52F or Lenovo B51-80
OS
Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10
CPU
i3 370M/i7 6500U
Motherboard
Asus/Lenovo
Memory
8GB - finally :)/8GB
Graphics Card(s)
it's an i3, dude!/dual Intel&nVidia
Sound Card
onboard
Monitor(s) Displays
15.6" built-in
Screen Resolution
1366x768/1920x1080
Hard Drives
750GB Seagate internal
Sundry external drives attached to other computers on the local network
1TB SSD on the Lenovo
PSU
n/a
Internet Speed
as much as I can get - usually on a dongle/phone, so <1MB/s
Antivirus
MSE/Defender
Browser
IE11/12/Edge/Chrome/FF(if I must)
I think that there are key finder programs that can do that if you have lost the original Product Keys that came with the Windows and Office Software. Tuneup Utilities also displays these keys in their System Information>Windows Page. Microsoft keeps these keys encrypted in the Registry so they are not easy to find out by searching for them.

But the best is to phone Microsoft and get the Product Keys as NoelIDP has already suggested.
 
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My Computer

Computer Manufacturer/Model Number
Custom Built
OS
Windows 7 Pro with SP1 32bit
Motherboard
Intel D845GVS1 X86-based PC
Memory
2 gigs of RAM
Graphics Card(s)
Intel(R) 82845G/GL/GE/PE/GV Graphics Controller
Sound Card
Realtek AC'97 Audio
Monitor(s) Displays
Samsung SyncMaster 931BF Black 19" LCD Monitor
Screen Resolution
1280X960
Hard Drives
1. SAMSUNG SP0822N ATA Device ~ 80 GigaBytes

2. Seagate FreeAgent Go USB Device ~ 500 GigaBytes
Keyboard
COMPAQ Standard PS/2 Keyboard
Mouse
iBall Laser Precise Speedster
Internet Speed
4 mb/sec
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