Rootkit?

I was reading another thread concerning laptops shutting off for no apparant reason and came accross a bit of advice regarding the possibility of a rootkit infection. I went to my own drivers folder through the ie link offered there looking for a randomly named .sys file. I found tcpip.sys.ORIGINAL. is this bad? Should I rename it to malware.old? My laptop: Model Name dynabook TX/670LSBI Part Number PATX670LSBI Serial Number X5275999K OS Version Microsoft Windows XP Professional 5.1.2600 Service Pack 2 BIOS Version V2.6C CPU Intel® Pentium® M processor 1.73GHz Physical Memory 512MB RAM Hard Disk Capacity 80,023,749,120 [Byte] 74.528 [GB] Hard Disk Free Space Capacity 16,815,771,648 [Byte] 15.661 [GB] Video Mobile Intel® 915GM/GMS,910GML Express Chipset Family version=6.14.10.4277 Screen Resolution 1024 x 768 Pixels Color Quality True Color (32 Bit) Sound Realtek AC97 Audio version=5.10.0.5830 Network Marvell Yukon 88E8036 PCI-E Fast Ethernet Controller version=8.24.3.3 MAC Address=00:0F:B0:9D:FF:21 Intel® PRO/Wireless 2200BG Network Connection version=9.0.2.31 MAC Address=00:13:CE:6C:82:24 Modem TOSHIBA Software Modem version=2.1.51.0 IDE Device 1 TOSHIBA MK8026GAX IDE Device 2 None IDE Device 3 TSSTcorp CD/DVDW TS-L632B FW version=TF32 IDE Device 4 None IDE Device 5 NERO IMAGEDRIVE2 2.26 IDE Device 6 ZX3370H VZW202C 1.0 Internet Explorer 7.0.5730.11 EC/KBC Version "" PS-MICOM Version ""

Hi deva,
The file you mention is not inherently dangerous (as a rule) and is usually as a result of a "patch" backing up your tcpip.sys, file and tagging on the "Original"
More information from here:
http://flum.se/articles/article.asp?id=14
However any file irrespective of its name can be dangerous…if you are in any doubt submit the file to jotti
http://virusscan.jotti.org/
or post an HJT log in the malware removal forum.
Regards
paws

Hi Deva,

Here is a link that tells all about Rootkits. I have had the free version installed for some time and run it monthly with clear results. Hope this is of some help including all the good advice Paws has given in his post to you.

kind regards,

Thank you team. I will look into all that.