The HT feature increases the performance. well if your computer runs better I suppose it would be better to have it on, but if it slows things down then I would close it.
Heres what wikipedia says about the performance
The advantages of Hyper-Threading are listed as: improved support for multi-threaded code, allowing multiple threads to run simultaneously, improved reaction and response time.
According to Intel, the first implementation only used an additional 5% of the die area
over the comparable non-hyperthreaded processor, yet yielded performance improvements of 15–30%.
Intel claims up to a 30% speed improvement compared against an otherwise identical, non-simultaneous multithreading
Pentium 4. The performance improvement seen is very application-dependent, however, and some programs actually slow down slightly when Hyper Threading Technology is turned on. This is due to the replay system
of the Pentium 4 tying up valuable execution resources, thereby starving the other thread. (The Pentium 4 Prescott core gained a replay queue, which reduces execution time needed for the replay system, but this is not enough to completely overcome the performance hit.) However, any performance degradation is unique to the Pentium 4 (due to various architectural nuances), and is not characteristic of simultaneous multithreading
Not stupit at all, If you need anything else let me know.