I had to reinstall both AOL and Bullguard virus protection recently. My computer is reacting extremely slowly and loading at a snails pace! When it does load an error message appears
RUNDLL error loading
C:\PROGRA~1|MYWEB~1.bin|MWSBAR.DLL

I have run a full scan which has thrown up no problems Can anyone tell me what this program is and if it is affecting the speed of my computer? Thanks:)

When was the last time you did some serious system maintenance on your machine ?
Here's my usual C&P for cases like this:


When was the last time you did some serious maintenance on your system ?

System maintenance includes:
Defrag
FULL patching
Virus scanning
Spyware scanning
removal of rubish files

Defrag is an inbuilt function in XP.
Open My Computer > Right click C: > Tools Tab and its there.

To make sure everything is running fine run both anti virus and anti spyware apps in normal AND safe modes. (make sure that they are updated first ! ;)) (AVG (http://free.grisoft.com/doc/1) is good and free AV)
(A couple of good removal tools are Spybot (http://www.safer-networking.org/) and Adaware (http://www.lavasoftusa.com/software/adaware/))

ALso an on line virus and spyware scanner is Trend Housecall (http://housecall.trendmicro.com/)

Just a note; actively running two AV's on one machine can cause problems.
So if you are thinking about it make sure your current one is disabled first.
Same thing applies to online scanners as well.

Removal of junk files is easy with CCleaner (http://www.ccleaner.com) a free app that does exactly what

If all this fails then a repair install may be in order:

Here's (http://www.microsoft.com/windowsxp/using/helpandsupport/learnmore/tips/doug92.mspx) the official Micro$oft way of doing it,
and Here's (http://www.geekstogo.com/forum/index.php?showtopic=138) one with screen shots.

Basically this installs windows over the top of your current setup.
So you don't loose any information you already have.

This lot should resolve your issue.

That dll file is part of the My Web Search toolbar. It is installed as part of other software packages, possibly when you installed AOL or Bullguard. You really don't need it. It just compounds the slow system problem. You should uninstall it from the add or remove programs control panel.

Check this link (http://www.pchell.com/support/mywebsearch.shtml) for instructions on how to remove it. See if that works.

In your private message, you said that it all shuts down? Please explain further. How far through the instructions did you get?