Skype issue

I recently downloaded SKYPE (3 days ago), The wife used it yesterday and there were no issues.  I was on and off the computer during the day (it was never shut down) with no problems.  This morning I went to start it up and it went into startup failure mode after trying the different windows fix tools including System restore,  I went to Norton 360  and it went through it's search and rescue process. uninstall/reinstall etc. during all this I noticed it had dumped SKYPE?  It is now running fine?  Is SKYPE A problem?  Should I have not loaded?  I did note that there are many different down load sites.