i hav done my graduation in BE,computer science,suggest gud course or certification tht can b done in 3months, that can improve my career.

How long u can make away ur computers from viruses? How many Anti-virus u will install for protecting ur computer? As Antivirus get installed in ur computer ur computer get slow. Am i right? Do u think that All the servers might be running on Windows? if so how much speed u will get in the network s