SVChost problem is a generic problem and we can not have a generic solution like this for that .....

If you check your running process list you will find 4 to 8 instances of svchost.... it's also the process which is most commonly attacked by viruses.....


but one thing is for sure it always comes because of a worm/virus attack.... if attcking virus is using port 445 or 135 then only it can be fixed by this method....

but most easy way to keep this problem is to keep your window updated with hotfixes provided by windows...