Start with a full scan with an up to date anti virus program followed by a
spyware hunt:

Spyware/scumware/adware are causing numerous system problems. I recommend
you download and use the following programs and consider removing everything
these programs identify. Be aware that there are frequent updates to these
programs and you need to check for them before every use.

AdAwa http://www.lavasoftusa.com/software/adaware/

CWShredder: http://www.spywareinfo.com/~merijn/cwschronicles.html (download
link near the bottom)

Spybot: http://www.safer-networking.org/


--
Regards

Ron Badour, MS MVP for W98
Tips: http://home.satx.rr.com/badour
Knowledge Base Info:
http://support.microsoft.com/default.aspx?pr=kbinfo

"John" wrote in message
...
occasionally my screen will flash a 3"x 3" square msg box
says 50% power with arrows pointing in different
directions also computer has been running real slow. any
help is appreciated

Thanks
John