i received a pc build by a friend. after i received it i was told i couldn't
download any updates, so i'm pretty sure i need to purchase and install a new
os system.
can i purchase an oem cd or do i have to purchase the full os. what's the
difference?
The OEM version can only legally be sold with hardware, although these
days, any piece of hardware, even a power cord, qualifies. Although if
you get a complete generic OEM version, it contains the same software,
it has the following disadvantages as compared with the retail
version:
1. Its license ties it permanently to the first computer it's
installed on. It can never legally be moved to another computer, sold,
or given away.
2. It can only do a clean installation, not an upgrade.
3. Microsoft provides no support for OEM versions. You can't call them
with a problem, but instead have to get any needed support from your
OEM; that support may range anywhere between good and non-existent. Or
you can get support elsewhere, such as in these newsgroups.
It's that first restriction that makes it a bad deal. I recommend the
Retail Upgrade version instead. It usually costs the same, or only
slightly more than an OEM copy.
And contrary to what many people think, the Upgrade version *can* do a
clean installation, as long as you have a CD of a previous qualifying
version to show it when prompted as proof of ownership. Most people
have such a CD, but worst case, if you don't, you can buy a used copy
of Windows 98 very inexpensively.