If you have lost your HCL PC motherboard CD then you can request for a new one from the official HCL site.
Note: This is India specific, so if you are from some other country, please drop a message so that I can fine appropriate link for you.
You can email customer support at hcltouch.reg@hcl.in or call HCL 24-hour customer care number on 1860-1800-425 or even send your query via SMS to +91 9911115555
Where can I download Drivers for my HCL PC?
Did you re install every thing freshly on your HCL computer and have no drivers now? This link will get you drivers for all models of HCL computer:
http://203.76.139.132:8080/examples/jsp/download/pon_index.jsp
or you can try this link as well: