I'm using a Thinkpad W520 with Windows 7 and a Crucial M4 256GB SSD (not sure if this is also part of the cause of the problem). Normally the boot up time is between 20 to 25 seconds. However, when I update the UltraNav driver to the latest version, the boot up time is significantly increased to around 50 seconds. And when I use Device Manager to roll back the version of the UltraNav driver to PS/2 Compatible Mouse, the boot up time is normal again.
My question is: has anyone else also observed this incompatibility issue between UltraNav with (Windows 7 or SSD)? Is there a solution to this problem?