This was a good laptop back in the day, there was regular laptop model and a swivel screen tablet model that used a (Wacom) digitizer pen. The X41 CPU is Pentium M, which has no PAE (Physical Address Extension) so you can't install Windows 10 and later on this machine. Windows 8.1 should install, as the PAE requirements were not introduced yet. Original OEM Driver only supported Windows XP and Windows 2000.
SoundMAX Integrated Digital Audio Driver
File: 1ya210ww.exe
Bluetooth with Enhanced Data Rate Software Driver
File: 7jba10ww.exe
Modem Driver
File: 78mv05ww.exe
Intel Chipset Support Driver
File: oss505ww.exe
Intel 900/910GML/915GM Driver
File: 77d115ww.exe
Tablet Button Driver for Windows XP Tablet Edition 2005
File: 7jgc08ww.exe
Broadcom NetXtreme/NetLink Fast/Gigabit Ethernet Software
File: 7ora09ww.exe
Intel Wireless LAN (11abgn, abg, bg) Driver
File: 7kwc50ww.exe
ThinkPad X41 (MT 1864, 1865, 2525, 2526, 2527, 2528) Maintenance Manual
File: ThinkPad Computer Maintenance.pdf
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Processor: Intel Pentium M LV 758 (1.50GHz, 90nm technology, 2MB L2 Cache, 400MHz FSB)
Wireless: Intel PRO 2200BG or 2915ABG, Bluetooth optional
OS: Windows XP Home/Pro
Screen: 12.1″ TFT XGA (1024 x 768)
RAM: 256MB or 512MB PC-4200 DDR-2 SDRAM (Upgradeable to 1536MB Max)
Hard Drive: 1.8″ 20GB, 30GB, 40GB or 60GB @ 4200RPM
Battery: 2.5 hr (4-cell) 5.7 hr (8-cell) (extended-life battery option adds 3 – 4 hours of life on top of quoted numbers for each respective battery)
Ports: 2 USB 2.0 (1 IBM Powered USB 2.0), Infrared, expansion bus (for optional ThinkPad X4 Ultra Base Doc); external display; AC adapter; RJ-11 modem port;RJ-45 ethernet port; audio: headphone/line-out, external microphone.
Slots: 1 PCMCIA card slot, 1 Secure Digital card slot
Dimensions: 10.5″ x 8.3″ x 1.06″ (w x d x h) (with 8-cell battery it’s 10.5″ x 9.3″ x 1.06″)
Weight: 2.7lb with 4-cell battery, 3.2lb with 8-cell battery