Dear All,
I will Delete everything and Format my C:/ drive.
In XP I could do this without a problem
every 3 months.
No, you could do it as often as you wanted to--every day if you like.
If you didn't do it more often than every 90 days, you could
reactivate over the internet; if it's before 90 days, you have to
activate by a quick and easy telephone call, but either way works.
In Vista in how many months I could do the above
without getting the risk of Microsoft rejecting my
Vista product key?
It's exactly the same in Vista. There is no such risk. The only issue,
as with XP, is whether internet activation works or telephone
activation is required.
By the way, reformatting and reinstalling every three months (or on
any schedule) is *enormous* overkill, either in XP or Vista. If you do
a decent job of maintaining your system, reinstallation should *never*
be required, unless you run up against a severe problem that normal
troubleshooting can't solve. I've run Windows 3.0, 3.1, WFWG 3.11,
Windows 95, Windows 98, Windows 2000, Windows XP, and Windows Vista,
each for the period of time before the next version came out, and each
on two machines here. I never reinstalled any of them, and I have
never had anything more than an occasional minor problem.