Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
Welcome to this forum.
Can you please give more details?
Microsoft's support for Windows XP ended in April 2014 -- three years ago.
MIcrosoft Vista was released in early 2007.
Any new computers purchased after date would have Vista pre-installed.
Thus, your computer, and especially your disk-drive, is probably over ten years old.
Sad to say, but it probably has "died".
The end of Microsoft's support for Vista was 2 days ago (April 11, 2017).
So, it's time for you to purchase a new (or "refurbished") computer, running Windows 7 or Windows 10.
If you are in the USA, see: www.bestbuy.com and search for "refurbished desktop computer".
You'll find refurbished computers, with keyboard & mouse, for under $100 US.
Keep your current monitor. You might have to replace your web-camera, scanner, and printer.
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