Whether my dual-core i5-m540@2.53Ghz is compatible with Windows 10 or not ?

[charp1]

I use a HP EliteBook 8440p (2010), running on licensed Windows7 Professional (SP1). 4GB ddr3 ram

[AlHill]

Your processor will run windows 10, but is not supported. If you are planning on installing, use the 32-bit version considering your low memory.

Now, with hardware as old as yours, you would do better getting a new(er) laptop.

Doc

[charp1]

Thank you Mr.Hill. Its rather desirable that I get me a new one. Thanks again Sir.

[AlHill]

Glad to help.

Doc