Looks like your GPU might be dying. Try to stress test it by running a benchmark, Unigine Heaven for example.
The strange noise coming from your graphic card?
So many things going on here.But first, what PC or notebook do you have? Specs and brand (if not custom build), please.
If it happens during some intense running process like flashplayer, or fucks up some driver files, like your vga card's driver, almost always makes the file system corrupted, and after restart windows can't load in.
my Geforce GT 430 is higher than Geforce 8 series right? otherwise I do not meet the system requirements for Unigine Heaven
GT 430 is like 6 years old, your CPU is from 2007.You said your PC is slow or is freezing. When was the last time you cleaned it from dust and reinstalled Windows?Having Windows for long period of time makes it messy and slow.Having lot of dust inside your PC (coolers, fans) makes it overheat and overheating makes PC slow, can make it freeze or turn off (safety reasons).When your PC is idle or when browsing web, open task manager and check CPU's usage.The starting beep, is it just one beep that's always there? If there's something wrong with your HW, some sequence of beeps tells you what's wrong - in such a case you need to find manual for your motherboard."The odd" sound, if you could find its source... You can simply open your PC case and place your ear close I think I don't need to write this but anyway: Be carefull, do not touch anything inside your PC while it is running. Also while listening don't get your hair stucked in some fan.
Just try it and see what happens. It should work.
Not much. I was hoping your PC would crash. How often do you get this error?