Any interesting and short games for PC game which can be completed in a sitting like one on one challenging games.

Well, Tabeer,
this is actually a forum about gaming malware and viruses that can be connected to games, or games that come with malware inside their packages if downloaded from suspicious sources.

Advice #1: If you are playing online games, make sure your Adobe Flash Player and Java are updated to the latest version.
Advice #2: If you are going to download an offline game, make sure you do it from an official or reliable source.
Advice #3: You can try 'Karateka' from 2012, it is short, sweet and challenging. Battles are one on one, or on small stages.

All the best,
Execute

Thanks Execute, Nice game. I had also played these kind of games like Takken 3, Street Fighter, king of fighter etc. Love these kind of games