no error found during diagnostic
here is the log:
Host Name: NISHCHAL-PC
OS Name: Microsoft Windows 7 Home Basic
OS Version: 6.1.7601 Service Pack 1 Build 7601
OS Manufacturer: Microsoft Corporation
OS Configuration: Standalone Workstation
OS Build Type: Multiprocessor Free
Registered Owner: Nishchal
Registered Organization:
Product ID: Removed
Original Install Date: 8/27/2011, 12:36:24 PM
System Boot Time: 12/26/2012, 9:30:54 AM
System Manufacturer: Dell Inc.
System Model: Inspiron N5110
System Type: x64-based PC
Processor(s): 1 Processor(s) Installed.
[01]: Intel64 Family 6 Model 42 Stepping 7 GenuineIntel ~2301 Mhz
BIOS Version: Dell Inc. A11, 8/3/2012
Windows Directory: C:\windows
System Directory: C:\windows\system32
Boot Device: \Device\HarddiskVolume2
System Locale: en-us;English (United States)
Input Locale: en-us;English (United States)
Time Zone: (UTC+04:00) Abu Dhabi, Muscat
Total Physical Memory: 4,003 MB
Available Physical Memory: 2,157 MB
Virtual Memory: Max Size: 8,005 MB
Virtual Memory: Available: 5,824 MB
Virtual Memory: In Use: 2,181 MB
Page File Location(s): C:\pagefile.sys
Domain: WORKGROUP
Logon Server: \\NISHCHAL-PC
Hotfix(s): 153 Hotfix(s) Installed.
[01]: 982861
[02]: KB2592687
[03]: KB2393802
[04]: KB2425227
[05]: KB2459268
[06]: KB2475792
[07]: KB2476490
[08]: KB2479628
[09]: KB2479943
[10]: KB2482122
[11]: KB2484033
[12]: KB2485376
[13]: KB2488113
[14]: KB2491683
[15]: KB2492386
[16]: KB2496898
[17]: KB2503665
[18]: KB2505438
[19]: KB2506014
[20]: KB2506212
[21]: KB2506928
[22]: KB2507618
[23]: KB2508272
[24]: KB2509553
[25]: KB2511250
[26]: KB2511455
[27]: KB2515325
[28]: KB2518869
[29]: KB2519736
[30]: KB2522422
[31]: KB2524375
[32]: KB2529073
[33]: KB2532531
[34]: KB2533552
[35]: KB2536275
[36]: KB2536276
[37]: KB2539635
[38]: KB2541014
[39]: KB2544893
[40]: KB2545698
[41]: KB2547666
[42]: KB2552343
[43]: KB2555917
[44]: KB2556532
[45]: KB2559049
[46]: KB2560656
[47]: KB2562937
[48]: KB2563227
[49]: KB2563894
[50]: KB2564958
[51]: KB2567053
[52]: KB2567680
[53]: KB2570791
[54]: KB2570947
[55]: KB2572077
[56]: KB2574819
[57]: KB2579686
[58]: KB2584146
[59]: KB2585542
[60]: KB2586448
[61]: KB2588516
[62]: KB2603229
[63]: KB2604115
[64]: KB2607576
[65]: KB2607712
[66]: KB2616676
[67]: KB2617657
[68]: KB2618444
[69]: KB2618451
[70]: KB2619339
[71]: KB2620704
[72]: KB2620712
[73]: KB2621440
[74]: KB2631813
[75]: KB2633873
[76]: KB2633952
[77]: KB2639308
[78]: KB2639417
[79]: KB2640148
[80]: KB2641653
[81]: KB2641690
[82]: KB2644615
[83]: KB2645640
[84]: KB2647516
[85]: KB2647518
[86]: KB2647753
[87]: KB2653956
[88]: KB2654428
[89]: KB2655992
[90]: KB2656356
[91]: KB2656373
[92]: KB2656411
[93]: KB2658846
[94]: KB2659262
[95]: KB2660075
[96]: KB2660465
[97]: KB2660649
[98]: KB2661254
[99]: KB2665364
[100]: KB2667402
[101]: KB2675157
[102]: KB2676562
[103]: KB2677070
[104]: KB2679255
[105]: KB2685811
[106]: KB2685813
[107]: KB2685939
[108]: KB2686831
[109]: KB2688338
[110]: KB2690533
[111]: KB2691442
[112]: KB2695962
[113]: KB2698365
[114]: KB2699779
[115]: KB2699988
[116]: KB2705219
[117]: KB2709162
[118]: KB2709630
[119]: KB2709715
[120]: KB2709981
[121]: KB2712808
[122]: KB2718523
[123]: KB2718704
[124]: KB2719177
[125]: KB2719857
[126]: KB2719985
[127]: KB2722913
[128]: KB2724197
[129]: KB2727528
[130]: KB2729094
[131]: KB2729452
[132]: KB2731771
[133]: KB2731847
[134]: KB2732059
[135]: KB2732487
[136]: KB2732500
[137]: KB2735855
[138]: KB2736233
[139]: KB2739159
[140]: KB2741355
[141]: KB2743555
[142]: KB2744842
[143]: KB2749655
[144]: KB2750841
[145]: KB2756822
[146]: KB2761217
[147]: KB2761226
[148]: KB2761451
[149]: KB2762895
[150]: KB2763523
[151]: KB958488
[152]: KB976902
[153]: KB982018
Network Card(s): 2 NIC(s) Installed.
[01]: Realtek PCIe FE Family Controller
Connection Name: Local Area Connection
Status: Media disconnected
[02]: Dell Wireless 1702 802.11b/g/n
Connection Name: Wireless Network Connection
DHCP Enabled: Yes
DHCP Server: 192.168.1.1
IP address(es)
[01]: 192.168.1.12
[02]: fe80::b13c:ef63:4eb9:5aec