My TI and cubase studio 4.5.2 are happy bunnies together other than known os3 issues.
i would recommend to not use the TI as your main audio card, its poor anyway
get rid of any undesired services and stop firewalls and virus programs running while in audio use. including any sevices running in the background they may have started. AVG leaves a service going even though you exit it.
Here is the world's best tune up site...
http://www.blackviper.com/
make sure you have the usb power saver set to disabled in the registry. The install does it for you on request. but make sure its "1".
also midi issues with time stamping in windows xp can be solved with this micrsoft update. where some pcs suffer from clock sync issues. especially laptops.
use the microsoft update kb896256
to enable
PerfEnablePackageIdle
at
http://support.microsoft.com/kb/896256
This update apparently straightens the use of your TSC clock in timestamps.
Quote from microsoft..........
"Correct TSC synchronization
On some operating systems, the processor TSC may change the rate at which it counts. Additionally, the processor TSC may stop counting when specific processor power management features are used. On computers that have multiple processors, the TSC is typically the operating system hardware timer that supports calls to the kernel KeQueryPerformanceCounter function. When TSC does not increment monotonically, system components that use the kernel KeQueryPerformanceCounter function may not work correctly. To address this problem, Microsoft makes it possible for the ACPI Power Management Timer to be used as the operating system timer that supports the kernel KeQueryPerformanceCounter function. However, some programs may directly access the TSC by bypassing the Windows timer APIs. The multiple-processor Hardware Abstraction Layer (HAL) makes sure that the TSC registers on all processors on a multiple-processor computer remain closely synchronized. Therefore, access by system software that may be directed to different processors does not return different results. This change makes sure that the multiple-processor HAL continues to correctly synchronize the TSCs across all processors on a computer, even if the ACPI power management timer is used as the operating system hardware timer. "
what i really find is a good audio pc is a good virus TI.
watch your cpu isn't spiking if that is happening there is something wrong.
you might have a faulty cpu too!
in normal pc use you wouldn't notice a faulty core as the mfr's don't care about us musi's. also you could have faulty Ram Too! don't assume that because your pc is happy in normal use that it meets audio specs. your cpu could be overheating and that cause spikes.