Hi,
You might have to Reinstall Win98 on your PC.
But first try to get in to SAFE MODE and see if you can
correct the problem or back up your data some how.
To reinstall Win98 Please read on.

For information on installing W98, go to:
http://home.satx.rr.com/badour/html/w98_restore.html
or go to:
http://www.waynescomputerworld.com/cleaninstall.html
^ Also tells you how to Formate/Reformate your Hard Drive
for Reintallation(s.)^ < Or upgrades.

But if you DON'T have a boot disk go to: www.bootdisk.com 

Hope this helped you.

C
For information on installing W98, go to:
http://home.satx.rr.com/badour/html/w98_restore.html
or go to:
http://www.waynescomputerworld.com/cleaninstall.html
^ Also tells you how to Formate/Reformate your Hard Drive
for Reintallation(s.)^ < Or upgrades.

But if you DON'T have a boot disk go to: www.bootdisk.com 

Need  a NEW Hard Drive or NEW computer Parts or Computer
stuff.GO TO:
http://www.tigerdirect.com/

Looking for your Driver name or file &/or software GO
TO:  http://www.driverguide.com/

Still don't know the name or manufcturer of your
driver.On  your driver, look for a sticker
with an FCC ID number. Then go to this site to determine
the manufacturer of your card.
http://www.fcc.gov/oet/fccid/help.html#drivers

Are you looking for RAM memory for your PC but still
can't find the right memory.
GO TO: www.crucial.com

Have a good day.

C

Memory is ram so uninstalling programs would not fix whatever the problem
was.  Was the error message  actually saying something about hard drive
space or perhaps system resources?

Here's an article about how to get into the system  and another about a
possible cause of the shutdown:

Recovering From a Failed Internet Explorer Upgrade in Windows 98
http://support.microsoft.com/default.aspx?scid=kb;en-us;249191

Windows 95/98 Boots Directly to "Shut Down" Screen
http://support.microsoft.com/?kbid=141898