Hi zoeymay,
Ehtray is a normal system process associated with Media Center. I've not
encountered any problems with the screensaver running while it does, but you
can disable it from loading on the startup tab of MSCONFIG (just enter this
into the search prompt).
You might also check that the file has not been altered by malware. Click
start and type ehtray into the prompt. Right click the topmost entry in the
start menu and select properties. The file size should be 139776 bytes
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help -
www.rickrogers.org
My thoughts
http://rick-mvp.blogspot.com