i have analyzed this problem for all these weeks ..i have come up with the conclusion that its a RPC(Remote Procedure Call) which is creating this problem..i diagnosed this when i could still start up task manager when i have desktop background and i end an svchost.exe process....Suddently a shutdown screen with a time down count of 1 minute appears saying that(RPC has been unexpectedly terminated..the system is going to shut down..save ur work..blah blah) ...But then all icons starts appearing and taskbar gets loaded...i rush into run command and type "shutdown -a" and the screen closes and i continue my work..
But this is irritating me..as i have to do it everytime i log into my computer ....and using Avira Internet Security its 'Mail guard and Web guard gets disabled due to ending this service....the scanner ..real time protection works still)
Btw my computer is clean of any infections and malwares....checked with Avira and MalwareBytes..
Plz..Plz..Plz.....help to solve my problem and any help would be gratefully appreciated....Thanking u all guys in advance..!!!Hope to get a reply soon and solve my problem fast...