Hi Ritaman52
The first thing I would do is turn off Remote Assistance that is built in to WinXP.
Click Start\Control Panel\Performance and Maintenance\System.
Click the Remote tab.
Uncheck "Allow Remote Assistance invitations to be sent from this computer".
Click Apply.
I would take a look in Add\Remove Programs for something like
PC-Anywhere or Remote Administrator.
If you are running a Firewall you could block his access if you knew what
program he is using.
I would also do a complete Virus Scan, just in case he gave you
a Trojan Horse.
If you don't have an anti-virus program
you can do an online scan here.
http://security.symantec.com/sscv6/d...d=ie&venid=sym
http://housecall.trendmicro.com/