explorer.exe

Hi all, not sure if this is the right place to post this, if not am sure a mod will move it to the relevant section, right this is my prob, have been using win7 build 7100 for a few months now and generally find it very good apart from one thing on occasions it slows down quite a bit, so when i go into task manger to see what is using the cpu up i find that i have more than one explorer.exe open using different amounts of memory i have had several explorer.exe.s open at any one time, so i close all but the one using the most mem, all the others i can safety close without the pc crashing or locking up has anyone else had this prob or is it just mine.

Specs

AMD64 athlon
3gig mem
asus mobo
asus ati graphics card
3 hd's 1ide, 2sata
ext hd
habu mouse
g15 keyboard
hp printer

if u need any more info just ask.

tia.

@dinesh will do m8


@TGSoldier, have eset32 v4, antivirus installed as well as malwareantibytes1.4 and spybot search and destroy 1.6.2 have run scans with all three programs apart form usual cookies pc is clean as whistle, i do run regular scan every week with S&D and Antibytes Nod32 runs everynight at 2 in morning.

@Dinesh how do u mean something fishy?? please elaborate!!

if by that u mean a dodgy copy of win7 then you would be wrong i downloaded it from the MS web site and got the key from them direct.

ok m8 my mistake.

here is screen shot of process

yea that becasue i closed a lot down will upload another screener when their are more running, i forgot i closed them down