3 ques; 1.desktop encr...2.wireless, 3.reinstall.xp...disk image

1. Somewhere is encryption turned on on desktop and i don't know where to
turn it off so when moving files i have problems and ignoring messages...

2. Is there a way to see desktop files on other computer, desktop is lika
folder but i seem not being able to find a way to see it from other
computer, nor vice versa.?

3.I would like to reinstall xp due to odd and slow computer processing and i
think harddisk needs to be freshly formated... i have made a disk image but
i am afraid of loosing data. Moreover i have valuable programs already
installed and working and all kind of adjustments hardly adjusted. So if
uninstalled, then disk formatted(3 partitions, 25gb+25+25) so i would have
clean formatted disk(i thnink without partitions !?) but...the disk imaging
is troubling me cause i'm doing it through winxp.

Thanks for helping me out !
Perohop