Working with client in CA, Employer in PA,signed Non Compete 7 Years back in MI

I joined a company A which is software consulting firm located in pittsburgh,PA in 2004.I signed a non compete agreement(that time i was living in MI state), before i join to a client of the company A, which was located in Texas.
In 2006 I moved to california to work for another company A client as the previous contract was over.

In 2007 that contract was over.I found a client in CA,which is not my employer's client,who is willing to hire me.I could not join because of immigration issues.I had to go through list of vendors.

So the chain is like this.
Company A (employer) --> B --> C --> D the client.
My question
Can i join company C with out any issues?
Is non compete still valid after 7 years?

Non Compete clause as follows
During the period until 2 years following the termination of your employment for whatever reason, you shall not directly otr indirectly solicit the business of or provide any software engineering, consulting or program services to any customer or end users of any customer of the company for which or whose benefit you provided services or were associated during your employment with the company.

Enforcement
In the event any provision of this agreement is judicially determined to be invalid or unenforceable that provision shall be interpreted and applied so as to carry out the fullest extent possible the parties intent as set forth in the language herein and the remainder of this agreement shall remain in full force and affect.

Thanks for your help.