How To Understand That Your PC is Infected With Virus

One of the biggest hard time you get with your PC is virus. There are lots of way to be get infected with virus. Sometimes people don't understand that his/her pc is infected with virus, but gradually is his/her PC or documents are destroying. Here are the few tips to determine your PC is infected with virus or not:

• First check that your task manager is disabled or not. Press crtl+ alt+del or right click on task bar if task manager doesn't appear then it is one of the sign of being infected.
• If registry editor is disabled - to understand this click on star menu and click run type 'regedit' if registry editor doesn't appears then there is possible chance that you PC is infected .
• If command prompt is disabled- type 'cmd' , idf command prompt doesn't appear then PC is infected.
• If there is no search option in start menu ( Windows XP) 
• If there is no program is running or no background program is running but cpu usage is more than 5% then there is a chance to be infected , to check this press crtl+alt+del , click performance tab in the task manager, look at the bottom of the task manager window for cpu usage. 
• If your hard drives or pen drive dont open after double clicking. 
• If open is seen in second place and weird things are seen in first place when you click right mouse on computer drives or pen drive.
• If PC shutting down automatically.
• If PC restarts simultaneously of his own.
• Takes long time to startup and shut down.
• When attempt to run a program , it takes long time to execute.
• Check that Folder options are present- got to my computer click tools menu look for folder options.
• Check that hidden files & folders option are present and working properly.
• When computer starts up it opens up with C:\windows or, C:\my documents.
• If there are no lots of programs installed but it shows drive C:\ full.
• PC hangs more frequently.
• If any message says to install certain antivirus program.
• Don't allow you to install any antivirus program.
• Shows log in option when PC starts up , but don't start up when you login.
• Shows any icon that doesn't belong to any program. 

This are major signs of being infected virus , but as there are lots of new virus are comings there working actions are also changing.