low VRAM

hi all ,

lately i have installed windows 10 on my laptop (probook 4540s) and i have a problem with my graphic drivers , my Vram is detected as 32 mb and i can't open any game ( everything was normal before installing windows 10 )

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and i also don't have switchable graphics anymore , i tried to update my drivers to see if it will solve the problem but it didn't and there is no option to increase the Vram in my Bios .
what should i do ?

 

 

thank you and excuse my english

 

Intel(R) core(TM) i5-3230M cpu @ 2.6GHz

memory 6144 MB

64bit operation system

Intel(R) HD Graphics 4000  approx.total memory 1792 MB

AMD Radeon HD 7500M/7600M series approx total memory 4846