Thanks for replying,

Check the screenshot below: 

my pc has TPM 2.0 and all other requirements listed on their site

@Saini1987  Given that it was just officially unveiled today, it might be better to wait until a possible future update to the health check app that might tell you WHY your system isn't compatible.  Or maybe send the question to Microsoft since they're the ones determining the system requirements for their OS.  But one possibility might be lack of TPM 2.0 support, which it seems Win11 will require.

Its Dell Inspiron 5577

@Saini1987  Have you checked Microsoft's own system requirements page here?  It mentions TPM 2.0 and also a requirement for DirectX 12 and WDDM 2.0 support from your GPU.  TPM 2.0 can be achieved with a TPM firmware update on some systems, and DX12 / WDDM 2.0 compatibility can sometimes be achieved with a driver update.  Maybe the drivers aren't available yet, but Win11 isn't expected to be available until the end of the year anyway.  But if your system won't support Win11 and can't be updated to support it, then I don't really see that as being Dell's fault.  Microsoft is setting the requirements here, not Dell, and Dell didn't guarantee that your system would be compatible with Win11, possibly because Microsoft didn't tell them what the requirements would be when they were designing your system.  And for that matter you didn't even specify your actual system model.  Saying you have an i7 processor is basically meaningless because there have been 11 generations of Intel Core processors such as the i7.

@Saini1987  Well then it could be DX 12 / WDDM 2.0 GPU drivers (did you check DxDiag to confirm support for those technologies?), or it could simply be a bug in the health check app.  It's Day 1 after all, and Microsoft isn't exactly known for bug-free launches.

Just an FYI, I have a 3 year old Precision laptop that meets all the listed requirements.  The health app and Windows Insider dialog both say the laptop doesn't support Win 11.  It's a pretty high end laptop, so I'm not sure what it thinks is missing or if there are other requirements that aren't listed its missing.  I find it hard to believe this laptop won't support Win 11 given it's specs and that it meets the listed requirements, so I'm just going to assume it's a bug with their analysis at the moment.

You should check your PC's processor with link: Windows Processor Requirements Windows 11 Supported Intel Processors | Microsoft Docs . According to this, Windows 11 maybe support Intel Core Gen 8th and up

I have a dell Inspiron 5594 with intel i7 10th gen.. I just checked and it is supporting me yay!

if its a i7 7th gen, then you will not have windows 11 because Microsoft has only give the update to generation 8th and up.. Time to upgrade!

Sorry mate!