Can a computer develop software problems after being dropped?

Took my computer into best-buy because it would not connect to the internet.. otherwise it was perfectly fine. They told us that we had a virus on it even tho the computer gets swept and cleaned everyday. After they shisted us out of 280$ for virus protection they call us a week later and say that the computers hard drive crashed, we asked them about the viruses and they said that there were never any viruses. So my original protection plan covered the actual problem. While shipping my computer to the service center it apparently got dropped and caused the entire front plate to shatter.. they fixed it with out my knowledge. A month later they finally call me to let me know that my computer is all ready to be picked up. I go there and computer does not work. Now the problem is something to do with my software.. which of course is not covered by my current protection plan. And they also informed me that my hard drive was fine.. they had to replace the motherboard.. I don't know much abou
about computers but I am pretty sure that I am being royally f***ed.

My understanding: You have dropped your computer and worried if it gets into any sort of trouble with the existing software. If my understanding is wrong, ignore the below sentence

Yeah it could if it happen to break/spoil any hardware stuff like, harddisk, RAM, CPU FAN etc. But it is not a software issue though.

Sorry to hear about your problem Megan. You probably didn't know but best buy is about the same as the geeks. Total rip offs. Again, I'm sorry.