Have you removed/fixed anything with Adaware or Spybot or add/removed programs lately? Your dll file may have been messed up. I did a search with google and found a site to download dll files (http://www.dll-files.com/dllindex/dll-files.shtml?msasn1) but I don't know if it's secure or trustworthy. I'm guessing you run windows, check with microsoft (http://www.microsoft.com). Here's the first result on a search I did on missing MSASN1.dll (http://support.microsoft.com/default.aspx?scid=kb;en-us;309288) and this is a search on regUtils.dll (http://search.microsoft.com/search/results.aspx?view=en-us&st=b&na=82&qu=RegUtils.dll).

Hope this helps.