I purchased Compaq Presario CQ40 Notebook / laptop and installed both XP + Vista operating systems. I purchased Idea Net Setter data card for internet facility (USB STICK-MODEL-EG1626- EDGE/GPRS/GSM AIR INERFACE). XP is unable to detect the same, while the Vista is detecting and operating very well. OS has been formatted twice, but, my problem was not solved. But, this data card is working well in other systems with XP OS both in laptops and desktops. I could not find out the reason for failure. A number of engineers tried to solve the problems, but showed their unability. I further humbly request that would you please give me the solution for this problem without asking me to format again. I shall ever be grateful to your, Honour, Sir,. Email: [email protected]. Phone contact No; +91-9849408030. System Information: OS Name:-Microsoft® Windows Vista? Ultimate ; Version:-6.0.6000 Build 6000 Other OS Description:- XP System Manufacturer:-Hewlett-Packard:- System Model Compaq Presario CQ40 Notebook PC System Type X86-based PC Processor Intel(R) Pentium(R) Dual CPU T3200 @ 2.00GHz, 2000 Mhz, 2 Core(s), 2 Logical Processor(s) BIOS Version/Date Hewlett-Packard F.12, 8/26/2008 SMBIOS Version 2.4 Total Physical Memory 3,034.35 MB Available Physical Memory 1.77 GB Total Virtual Memory 6.12GB Available Virtual Memory 5.13 GB Page File Space:-3.26 GB