- Can I get the 7th year extension & H1B extn with the Company A's MTR..? - For both company A & B it is the same Attorney.

Do you have H1b authorization for company C? If you have maintained your status an extension may be possible.

Why this security Check is taking too long ? And what I can do more than that ? should I worry ?

Not much else to be done except wait and make status inquiries. At some point confer with your attorney about mandamus.

Will my educational background have some issues if I do ineb2? Which is best in my case eb2 or eb3?

The minimum job requirements determine the education required.

Please make sure you are in a safe place. It may be possible to proceed with an I-360 petition but strongly recommend you speak directly with an...

If I proposal and then a quick wedding, will this complicate things with regards to my family being allowed to stay in the USA?

Not with the marriage but likely there will be questions asked by CIS as to your fiance's 'preconceived' intent when she entered the US as a...

Can travel

You will likely be fine, however, best to meet with an immigration attorney before departing.

What is the duration and possibility of changing from H4 to H1 being inside US

If you maintained status your employer could have submitted a change of status with the H-1B submission. Speak with your employers attorney.

I am asylum pending. I got my EAD. Should I get changed my SSN to non-restrict one?

You can get the non restricted SS card when you receive permanent resident status.

Can I visit my wife in the U.S after I-130 submission

It is possible but it will be difficult to convince CBP and the US consulate that your wife has non immigrant intent as there is an immigrant visa...

Can I reinstate my f1 status after five months while studying under Temporary Protected Status?

Discuss you situation with your DSO as you will need to work with the school on reinstatement if eleigible