MSI-6590 USB & Overclocking problem

Question

Got two things for a real long time messed up on my computer:
the first: my keyboard (Logitech Internetkeys USB) won't always work when booting up when it is connected
the computer just boots etc but the USB port where it is plugged in (and others to) won't work anymore, but when i unplug it, press the powerbutton and just after less than a sec plug it in, it always works fine
sometimes it does work when it is plugged in, got this going on for like two years now... just wondered if it could be fixed in a simple way or that anyone recognizes the problem
(I'm running latest bios driver and VIA driver)
Second one: when i raise my fsb over 136 my system gets unstable or when I want to "save bios and exit" it just hangs, screen goes out, no image, no beeps, nothing, after resetting bios by shorting the two pins on my mainboard everything just works as normal
I know that 133fsb is the normal correct speed but as I am planning to buy a new board (the diamond series board) I wanted to know how far I could push this system
(I have a 350watt power supply, it came with the case (Codegen) the whole case incl PSU came at 59.9€ two years ago)
Hope someone can help me with either one of the probs
Grtz

Answer 1

just added the drive etc info on  my last reply srry I didn't think of that rightaway
Now you mention it, it really makes sence (or however you spell that word)   still strange tough that even after a while the usb ports won't "powerup"... But it is true that most times the thingy still works is when i reboot after about a few mins shut down, and transistors do tend to keep power for a while before the board is completely "powerless"
when resetting my keyboard also keeps working, gonna trie to boot with mouse (optical also logitech) disconnected, joystick disconnected, maybe my mouse consumes a bit to much when booting up when put all together? dunno, don't really know alot about voltage etc
PS: i am going to upgrade in about a month, but i will fetch me a new psu (because i'm planning on buying a diamond series board so 350watt just won't do it) and a new cooler that fits both sockel A and 939, my temps are ok, even at 136fsb when it's running stable temps is still same as normal +/- 40° on low usage, and +/- 52° at max usage, (depends alot on room temp but bottom line is: no high temps are the problem)