Older laptops with AMD/Intel 'switchable' graphics trying to upgrade to W10 have big issues. Any 1st or 2nd generation Intel processor with HD2000 or HD3000 (or older HD graphics) are not supported under Win 10 and no matter what AMD graphics is associated with it, will have switchable graphics problems. Intel released a chart making it very clear:
The below tables provide a comprehensive list of supported operating systems on a per-processor or graphics technology basis. Use the links below to find the appropriate section containing your Intel® graphics product and its associated operating system support.