Hi Kostas,
Here is the latest chipset drivers for the AMD 760G.
Here are the steps for your error 124
1 Ensure that none of the hardware components are overclocked. Hardware that is driven beyond its design specifications – by overclocking – can malfunction in unpredictable ways.

2 Ensure that the machine is adequately cooled. If there is any doubt, open up the side of the PC case (be mindful of any relevant warranty conditions!) and point a mains fan squarely at the motherboard. That will rule out most (lack of) cooling issues.

3 Update all hardware-related driver: video, sound, RAID (if any), NIC… anything that interacts with a piece of hardware. It is good practice to run the latest drivers anyway.

4 Update the motherboard BIOS according to the manufacturer’s instructions. Their website should provide detailed instructions as to the brand and model-specific procedure.

5 Rarely, bugs in the OS may cause “false positive” 0x124 events where the hardware wasn’t complaining but Windows thought otherwise (because of the bug). At the time of writing, Windows 7 is not known to suffer from any such defects, but it is nevertheless important to always keep Windows itself updated. 

6 Attempt to (stress) test those hardware components which can be put through their paces artificially. The most obvious examples are the RAM and HDD(s). For the RAM, use the in-built memory diagnostics (run MDSCHED) or the 3rd-party memtest86 utility to run many hours worth of testing. For hard drives, check whether CHKDSK /R finds any problems on the drive(s), notably “bad sectors”. Unreliable RAM, in particular, is deadly as far as software is concerned, and anything other than a 100% clear memory test result is cause for concern. Unfortunately, even a 100% clear result from the diagnostics utilities does not guarantee that the RAM is free from defects – only that none were encountered during the test passes.

7 As the last of the non-invasive troubleshooting steps, perform a “vanilla” reinstallation of Windows: just the OS itself without any additional applications, games, utilities, updates, or new drivers – NOTHING AT ALL that is not sourced from the Windows 7 disc. Should that fail to mitigate the 0x124 problem, jump to the next steps. Otherwise, if you run the “vanilla” installation long enough to convince yourself that not a single 0x124 crash has occurred, start installing updates and applications slowly, always pausing between successive additions long enough to get a feel for whether the machine is still free from 0x124 crashes. Should the crashing resume, obviously the very last software addition(s) may be somehow linked to the root cause.

8 Clean and carefully remove any dust from the inside of the machine. Reseat all connectors and memory modules. Use a can of compressed air to clean out the RAM DIMM sockets as much as possible.

9 If all else fails, start removing items of hardware one-by-one in the hope that the culprit is something non-essential which can be removed. Obviously, this type of testing is a lot easier if you’ve got access to equivalent components in order to perform swaps.