I connected my phone through the
USB cable to a computer...but then I wasn't able to view my phone's files on that computer because of driver problems..but the problem is my fren said that the computer that I connected my phone contains virus..it seems that my fren got insert the pen drive into the same computer before...all his data changed into shortcuts...so, what should I do now??how to check whether my phone now infected with virus or not???
Sent from my Nokia Lumia 920 using Tapatalk
Please don't take this the wrong way, this is not meant as an offense, but either you or your "fren" (gooby, pls!) are/is a complete computer illiterate. There's so much wrong with this statement, I do not even know where to begin. First of all, it is highly unlikely that a computer virus will behave that way. Here's an accurate venn diagram of the most common causes for virus problems.
https://xkcd.com/1180/
This clearly shows that often users scream "this must be a virus" even though it was caused by something they did wrong or didn't understand. So, you'll always have to make sure to check a possibly infected computer using a proper Antivirus software, preferably one that is run off a clean, definatelly non-indected system (Linux Live Systems come to mind) before running around screaming "VIRUS!".
There's nothing for a Virus to gain to "change everything into a shortcut", that would be a pretty stupid virus, modern viruses try to stay as hidden as possible, not to get the users attention (except for scareware, that try to get the user to either buy an advertised antivirus software or a fee to make the computer usable again). Changing files to shortcuts would seem like a pretty obvious way to get the attention of a user but since there's no indication of scareware it was most likely cause by the wrong use of a different, non-malicous software.
Virii don't work that way. There is zero chance that a Windows (x86/64) virus could affect a Windows Phone.
This is only half true. When you connect a phone (be it android or windows Phone) to your PC, the device will be mounted as what is known as an MTP device. Applications on your computer (including malware) will be able to store files on the device. These could be infected files. YOu are right in saying that there's no way for Windows to store a virus on the device that will be *active* on the phone, but it could use the phones MTP storage as a way to spread itself to other x86/64 PCs. With android it's even worse, as malicous software could actually be installed on your phone in the background (using adb) and actually a similar attack could possibly be implemented for windows phone (provided the windows phone is developer unlocked). For windows phone, this should not actually cause any issues as installed apps (even sideloaded) have very limited rights and are pretty much restricted to their sandbox so you could simply remove the software from your phone again and be clean.
But, if you still have some doubts about it, do a full back up of you phone and then hard reset it. That way, you will be sure there are nothing but system files on your L920. 
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