No.1 is to search through these posts. In many cases many models of laptops have been supplied Master numbers and/or details on how to remove the bootup passwords
No 2 option is to always contact Dell (or your laptop manufacture), if you are under warranty it might be a free service; if you are not under warranty they offer a reduced cost. Someone reported the cost was as low as $37 (ouside warranty)
No.3 would be to post a request here. Many members have had replies with the exact solution (sometimes hardware related - shorting out pins, so forth)
In all cases if you feel that nothing has worked successfully from reading previous posts and through member's free support replies, then refer to No. 2 which is by far the most economical solution.
This email support person you are referring to:
Firstly the member was banned for asking for payment of service on TechSpot (against the rules here)
Secondly the cost reported by desperate members, far exceeded any manufacture cost.
Thirdly, is Not the best support solution, without tring the first 3 first. Put it this way I wouldn't email him, especially if this support may be free anyway.
Therefore don't bother with these bad support posts, with contact so and so.
As that would be the absolute last option (not first)