Hi
This depends on what other software you are using. If you are using Norton products or ZoneAlarm Internet Security you may have issues.
Also, are you using the AV plugin? Many users have noticed that this is the culprit for many problems.
Many users are commenting on the improved stability of version 5.0.0.174, I would suggest upgrading to this if you have not already.
If you are overly concerned, SDv4 is available to download
here