BB synching problem

I am having problems with synching  my Verizon BB Tour 9630 with BB desktop on my Windows XP PC (BB desktop to 5.0.1 and  BB to  Sometimes it works but sometimes it locks up my PC when I have to reboot the PC.  Under Properties in About for my BB Desktop traybar, I saw BlackBerryDevice Manager and BBDevMgr  Are both of these supposed to be present or do I have two versions conflicting with each other?  Thank you in advance for any suggestions.

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