Hello, Joan.
"However I deleted it (IE8) from "all programs" and now it's not appearing on start up"
-that's a bit heavy-handed, the problem will lie with something that is calling it, or some entry that is starting it. In XP in the Docs n Setts\You folder there is a folder called Start Menu, may be an entry there, but I don't know why anything would put one there. That is what caper is referring to.
This Browser Manager you have... it's starting from a very weird place, AppInit_DLLS. That key is usually the preserve of kernel stuff and antivirus. What is Browser Manager, what does it do?
I'd put IE8 back if it's still in your Recycle Bin. You could try restarting Hijackthis, scanning and putting a checkmark against:
O20 - AppInit_DLLs: c:\docume~1\alluse~1\applic~1\browse~1\22580~1.182{16cdf~1\brwmngr.dll
...and pressing Fix Checked.
Then restart.
I would not use Sybot myself.. you have good coverage with MBAM [the best antispyware tool] and Defender.
You run your compy as an Administrator, don't you? Otherwise that Appinit_DLLS entry would not have been made. Maybe you installed something, and that item piggy-backed in.