Phil said:
I think you have been wrongly advised regarding reinstalling everything.
That should be your last resort. Someone else's Win XP CDs will not work on
your computer.
Those statement needs qualifying.
The first statement regarding reinstalling everything...
If you allow someone else to run software on your computer, it is not your
computer any more. There is no way you can be sure that the machine is clean,
other than by reinstalling. The action you take should depend on the nature of
the infection you have detected. As we do not know what that infection was, and
the likelihood of further, hidden, malware, it is difficult to comment.
The second statement regarding someone else's WinXP CD's not working...
Windows XP CD's created by hardware vendors (specific OEM CD's) will only work
on the MAKE, and sometimes MODEL of PC for which they are intended, and are
typically restricted to a subset of product keys and/or BIOS signatures. The
stickers that go with these products contain the name of the hardware
manufacturer. (These keys, known as VLKs) CANNOT be used with generic OEM or
retail CD's.
Generic OEM CD's (supplied with a thin booklet in a plastic bag) manufactured
with Microsoft will work with any hardware, and any Generic OEM key. For these,
you need a generic OEM CD.
Retail CD's (supplied in a Microsoft labelled cardboard box, with more extensive
documentation) will work on any hardware, MAY have requirements about qualifying
products (Upgrade retail CDs), and only work with retail product keys.
So, if you can get the right type of disk (VLK, OEM or Retail) to match your
key, you can use that disk.