To verify that a compatibility fix addresses an issue, you must test the repaired application by running it under the destination user account. Compatibility Fixes. The following table lists the known compatibility fixes for all Windows operating systems that have been released from Windows Vista through Windows 10. There is no free upgrade from Vista to 7, 8.1 or 10. Follow these steps before you buy Windows 7. Microsoft no longer sells 7; try amazon.com. Go to your Computer / Laptop Manufacturer's website and see if Windows 7 Drivers are available for your Make and Model Computer / Laptop.
There is no free upgrade from Vista to 7, 8.1 or 10.
Follow these steps before you buy Windows 7.
Microsoft no longer sells 7; try amazon.com.
Go to your Computer / Laptop Manufacturer's website and see if Windows 7 Drivers are available for your Make and Model Computer / Laptop.
If not available, Windows 7 will not work correctly for you.
Run the 'Windows 7 Upgrade Advisor'
Check to see if your System Specifications are compatible for Windows 7:
'Windows 7 system requirements'
'Windows 7 Compatibility Centre' for Software and Hardware:
Windows 7 Upgrade paths:
'Installing and reinstalling Windows 7'
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Follow these steps before you buy and Upgrade (clean install) to Windows 8.1.
Check to see if your Computer/Laptop Manufacturer has Windows 8.1 Drivers available for your Model.
If not available, Windows 8.1 will not install and work correctly for you.
There is a lot of information in this first Microsoft link:
Windows 10 And Vista Compatibility Guide
Download and run the Windows 8.1 Upgrade Assistant to see if your machine is Windows 8.1 compatible and read the Update to Windows 8.1: FAQs there
'Update to Windows 8.1: FAQ'
Windows 10 And Vista Compatibility Software
![Windows 10 And Vista Compatibility Windows 10 And Vista Compatibility](/uploads/1/2/4/8/124880433/293663736.jpg)
'Windows 8.1 system requirements'
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How to buy Windows 10:
But first make sure that you have the correct system requirements and that your Computer Manufacturer supplies the correct Drivers for 10.
![Windows Windows](https://images-na.ssl-images-amazon.com/images/I/61JKPtbXKYL._SR500,500_.jpg)
'Windows 10 System Requirements'
Microsoft is making Windows 10 available as free upgrade for qualified Windows 7, Windows 8.1, and Windows Phone 8.1 devices. It will be available starting July 29, 2015
'Windows 10 FAQs'
Cheers.