Why your laptop keeps restarting in a loop
Short answer: A boot loop — where a laptop restarts repeatedly without fully loading the operating system — is caused by one of four things: corrupt Windows or macOS system files (most common), a failing NVMe SSD or hard disk, a faulty RAM module, or a driver crash that Windows cannot recover from. In India, a power-cut mid-update is the leading single trigger. Most boot loops are software-fixable at zero hardware cost; the remainder need an SSD or RAM replacement under ₹6,500.
How to diagnose and fix a laptop boot loop
Step 1: Identify where in the loop the laptop stalls
Not all boot loops look the same, and the stall point tells you where to look. Three patterns appear most often. The first is the laptop reaching the Windows spinning-dots logo and then restarting — this points to a corrupt bootloader or partial Windows update. The second is the laptop reaching the Windows login screen, crashing with a blue screen (BSOD — Blue Screen Of Death, the error screen Windows shows on a fatal crash), and restarting — this points to a driver fault or hardware problem. The third is the laptop not even reaching the Windows logo, restarting immediately after the manufacturer’s splash screen — this usually points to a storage or BIOS-level issue.
For pattern one and two, press F8 or F11 repeatedly as soon as the laptop powers on to reach the Windows Recovery Environment (WinRE) — the built-in recovery tool. If you can reach WinRE, the drive is working and a software fix is likely possible. If you cannot, or if the third pattern appears, jump to Step 3.
Step 2: Run Startup Repair and check for bad drivers
Inside WinRE, choose Troubleshoot → Advanced Options → Startup Repair. This tool scans for missing or corrupt boot files and replaces them automatically. It handles the majority of post-update boot loops in under ten minutes.
If Startup Repair completes but the loop continues, the culprit is usually a driver — software that lets Windows talk to a hardware component. A newly installed graphics driver or chipset driver (from HP, Dell, Lenovo, etc.) can crash Windows on every restart. In WinRE choose Troubleshoot → Advanced Options → System Restore to roll back to a point before the driver was installed, or use Safe Mode (minimal drivers only) to uninstall the bad driver. If you would rather skip all of this, a fresh Windows OS reinstall from a bootable USB takes about 45 minutes and costs no hardware money — just your data needs backing up first.
Step 3: Test the RAM sticks
If software repairs have not resolved the loop, RAM (Random Access Memory — your laptop’s short-term working memory) is the next suspect. A faulty RAM module can cause Windows to crash before fully loading. On laptops with two RAM slots, the simplest test is to remove one stick and attempt to boot. If the loop stops, the removed stick is faulty. Swap and repeat to confirm. DDR4 and DDR5 RAM sticks for mainstream HP, Dell, and Lenovo laptops typically cost ₹1,500–₹3,500 for 8GB; soldered RAM on ultrabooks and MacBooks requires a board-level fix.
Step 4: The India pattern — pirated Windows and power-cut interruptions
Across India, two triggers account for a disproportionate share of boot-loop cases that land on the bench. The first is pirated or unactivated Windows installations. A pirated Windows copy often misses critical security and system updates, leaving gaps in the boot chain that a genuine OS update would have sealed. When the system finally attempts an update, the inconsistent file state causes corruption. The second trigger is a power cut during a Windows update — partial update files leave the boot sector in a broken state. Both situations are solved by the same remedy: a genuine Windows 11 licence and a clean reinstall. Our boot-loop repair service handles both, including data backup before the reinstall, and the repair is typically complete same day. For hardware-related loops — especially SSD failures — our technicians can also help you understand whether repair or replacement makes more sense for your specific model.
When to call a laptop repair service (and what it costs in India)
When DIY ends
Stop and call a technician if: (1) WinRE is inaccessible and the laptop will not boot from a USB recovery drive either; (2) the internal drive is not detected in BIOS; (3) the blue screen error code points to hardware (common codes: CRITICAL_PROCESS_DIED, MEMORY_MANAGEMENT, UNEXPECTED_KERNEL_MODE_TRAP); or (4) the loop started immediately after a physical knock or liquid spill.
Typical repair cost in India
Startup Repair from USB (DIY): free. Driver rollback or Safe Mode fix: free. Clean Windows 11 reinstall with genuine licence: ₹2,500–₹4,500. RAM replacement (single stick): ₹1,500–₹3,500. SSD replacement with data recovery attempt: ₹2,500–₹6,500. Related: if the laptop also shows a firmware freeze, read our BIOS stuck guide alongside this one — the two issues sometimes appear together after a power-cut event.
A note from the LRW Engineer Team
The fastest way to confirm whether a boot loop is software or hardware is to boot from an external USB drive with a fresh Windows image. If the laptop runs stably from the USB, the internal drive or its OS is the problem — not the motherboard or CPU. That single test eliminates half the diagnostic tree before anyone opens the machine.